Fatal error: Uncaught Error: Call to undefined function WC() in /home4/tikka7zh/public_html/wp-content/plugins/order-tip-woo/frontend/controllers/main.class.php:120 Stack trace: #0 /home4/tikka7zh/public_html/wp-includes/class-wp-hook.php(303): WOO_Order_Tip_Main->init_session('') #1 /home4/tikka7zh/public_html/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters(NULL, Array) #2 /home4/tikka7zh/public_html/wp-includes/plugin.php(470): WP_Hook->do_action(Array) #3 /home4/tikka7zh/public_html/wp-settings.php(578): do_action('init') #4 /home4/tikka7zh/public_html/wp-config.php(103): require_once('/home4/tikka7zh...') #5 /home4/tikka7zh/public_html/wp-load.php(50): require_once('/home4/tikka7zh...') #6 /home4/tikka7zh/public_html/wp-blog-header.php(13): require_once('/home4/tikka7zh...') #7 /home4/tikka7zh/public_html/index.php(17): require('/home4/tikka7zh...') #8 {main} thrown in /home4/tikka7zh/public_html/wp-content/plugins/order-tip-woo/frontend/controllers/main.class.php on line 120